Question

Ce arie are un patrat cu perimetrul de 7 cm?

Answer 1

$\it \mathcal{P} =4\ell \Rightarrow \ell=\dfrac{\mathcal{P}}{4} =\dfrac{^{25)}7}{\ \ 4} =\dfrac{175}{100} = 1,75\\ \\ \\ \mathcal{A}=\ell^2=1,75^2=3,0625\ cm^2$